The ring and ball method of test for softening point of bituminous materials, resins, and similar substances
Volume Bureau of Standards Journal of Research, Vol. 4, No. 2 , p. 195. Research Paper 142 (RP142)
Publisher National Bureau of Standards
Possible copyright status The Bureau of Standards Journal of Research is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. However, please pay special attention to the individual works to make sure there are no copyright restrictions indicated. Individual works may require securing other permissions from the original copyright holder.
Call number QC1 .U52 1930 V 4
Digitizing sponsor NIST Research Library
Book contributor NIST Research Library
Collection NBSBulletin; NISTresearchlibrary; fedlink; americana